Safety stop-cock for gas-fixtures



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L. BRODT. SAFETY STOP 000K FUR GAS FIXTURES. N0. 508,275.

I a w a d A 1 flzitorney UNITED ST T-Es PATENT OFF E.

LINCOLN BR ODT, OF WEST OAKLAND, CALIFORNIA.

SA FETY S TOP-COCK FOR GAS-FIXTURES.

SPECIFICATION forming part 'of Letters Patent'N'o. 508,275, datedNovember 7, 1s 93.

Application filed March 11,1893. lSerial lTo. 465,511- (No model.)

To aZZ whom) it may concern; I

Be it known that I, LINCOLN BRoDT, a

citizen of'the United States, and a resident of West Oakland, in thecounty of Alameda and State of California, have invented certain new anduseful Improvements in Safety Stop- (Jocks for Gas-Fixtures; and I dodeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification. Figure 1 of the drawings is aview in elevation partly in section showing the invention as appliedwith the cock closed. Fig. 2 is a detail sectional view of .theinvention with the cock open. Fig. 3 is a detail perspective view ofportion of the fixture and Fig. 4 is a detail sectional view of the cookor valve.

This invention has relation to certain new and useful improvements insafety stop cocks for gas fixtures, and it consists in the novelconstruction and combination of parts, all as hereinafter described andpointed out in the claims.

The object of the invention is to provide a stop cock of this characterwith a simple and efficient safeguard against its being accidentallyturned, as frequently happens with the old style of cooks, the escapinggas often causing fatal results.

Referring to the accompanying drawings, the letter A designates thatportion of a gas fixture which contains the seat a for the cook orvalve; B designates the feed pipe connection, and O the burner arm, saidconnections being made in the usual or in any well known manner.

In the particular form of fixture illustrated, the seat a for the cookor valve is formed through the vertical arm or portion D of the fixture,and intersects the gas passage b at right angles.

E designates the cook or valve which has a rotary and a verticalmovement in said seat, and is formed with a horizontal aperture 0therethrough, which when the cock is in the closed position shown inFig. 1, is in a position substantially at right angles to the gaspassage b, and considerably below the plane thereof. The projecting stemof said cock at the lower end carries the usual finger piece cl. Saidstem also carries a projecting pin e, which when the cock is closed liesbetween the walls per end portion of the cock is a coiled spring G,which at its upper end bears against a screw plug F, seated in the upperportion of the seat a. The vertical slot f at its upper end has ahorizontal extension 9, and in order to open the cook, it is firstnecessary to press the stem upwardly against the tension of the spring Gsufficiently to bring the pin e into alignment with said horizontalextension, and this vertical movement also brings the aperture c to theplane of the gas passage 1). 'When in this position, the cock may berotated sufficiently to bring said aperture and passage into alignment,the end wall of said slot extension serving as a stop to prevent itsbeing rotated beyond the point of alignment. The position of the partswith the cock open is shown in Fig. 1.

In order that the cock may form a tight joint with its seat for thepurpose of preventing the escape of gas around it, its upper portion isformed with a downward taper or conical portion h, as shown, having anofiset, and reduced portion at h, the seat at this point having acorresponding form. It will be apparent that the vertical movementagainst the spring required in order to bring the cock into position topermit its rotation, forms an efficientsafeguarda'gainst saidcockbeingopened in any accidentalmanner.

It will be understood that I do not wish to limit myself to theapplication of my improvement to the particular form of fixture shownand described, as it is evident that I may adapt it to other forms offixture without departing from the spirit and scope of the invention.

Having described this invention, what I claim, and desire to secure byLetters Patent, 1s

1. The combination with the fixture having the seat therein, theVertical slot in the lower wall of said seat, and the horizontalextension at the upper end of said seat, of the valve or cook capable ofa vertical and a rotary movement in said seat, the spring bearing on theupper end portion of said cock or valve, and the pin projecting from thestem of said valve and normally engaging said vertical slot,substantially as specified.

2. The combination with the fixture having the gas passage therethrough,the seat intersecting said passage, and the slot in the lower wall ofsaid seat, said slot having a horizontal extension at its upper end, ofthe valve or cook having a rotary and a vertical movement in said seat,a gas aperture therethrough normally below the plane of said gaspassage, and out of alignment therewith, a pin projecting from the stemof said valve or cook and normally in engagement with said verticalslot, the spring seated on the upper portion of said valve or cock, andthe screw plug against which the upper end of said spring bears,substantially as specified.

3. The combination with the fixture having the gas passage therethrough,and the seat intersecting said passage, of the valve or cook having avertical and a rotary movement in said seat and means for normallypreventing said rotary movement, said valve or cook having a tapered orconical portion, normally fitting a similarly-shaped portion of theseat, and a gas opening through said plug, said opening being below theplane of the gas passage through the fixture when the plug is closed,substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

LINCOLN BRODT.

Witnesses:

OTTO NIEHAUs, W. E. BoYER.

